@media (-webkit-device-pixel-ratio: 1.5), (device-pixel-ratio: 1.5) {
  .border-1px:after {
    -webkit-transform: scaleY(0.7);
    transform: scaleY(0.7);
  }
}
@media (-webkit-device-pixel-ratio: 2), (device-pixel-ratio: 2) {
  .border-1px:after {
    -webkit-transform: scaleY(0.5);
    transform: scaleY(0.5);
  }
}
.border-1px {
  position: relative;
}
.border-1px:after {
  display: block;
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  border-top: 1px solid #f5f5f5;
  content: '';
}
.clearfix {
  display: inline-block;
}
.clearfix::after {
  display: block;
  content: ".";
  height: 0;
  line-height: 0;
  clear: both;
  visibility: hidden;
}
